Block renderer-initiated main frame navigations to data URLs

third_party/WebKit/Source/core/frame/LocalFrameClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
@@ skipping 216 matching lines @@
   virtual void runScriptsAtDocumentIdle() = 0;
 
   virtual void didCreateScriptContext(v8::Local<v8::Context>, int worldId) = 0;
   virtual void willReleaseScriptContext(v8::Local<v8::Context>,
                                         int worldId) = 0;
   virtual bool allowScriptExtensions() = 0;
 
   virtual void didChangeScrollOffset() {}
   virtual void didUpdateCurrentHistoryItem() {}
 
+  // Called when a content-initiated, main frame navigation to a data URL is
+  // about to occur.
+  virtual bool allowContentInitiatedDataUrlNavigations(const KURL&) {
+    return false;
+  }
+
   virtual WebCookieJar* cookieJar() const = 0;
 
   virtual void didChangeName(const String&) {}
 
   virtual void didEnforceInsecureRequestPolicy(WebInsecureRequestPolicy) {}
 
   virtual void didUpdateToUniqueOrigin() {}
 
   virtual void didChangeSandboxFlags(Frame* childFrame, SandboxFlags) {}
 
@@ skipping 67 matching lines @@
   virtual void setHasReceivedUserGesture() {}
 
   virtual void abortClientNavigation() {}
 
   virtual TextCheckerClient& textCheckerClient() const = 0;
 };
 
 }  // namespace blink
 
 #endif  // LocalFrameClient_h